Resolution of paging collisions in multisim and c-rat operation

ABSTRACT

Certain aspects of the present disclosure provide techniques for resolving paging collisions, for example, for a UE camped on multiple cells. In some cases, a UE detects, based on paging configurations, a conflict between configured paging occasions of at least two cells on which the UE is camped, signals an indication of the conflict to at least one of the cells, and receives information regarding a new paging configuration designed to resolve the conflict. In some cases, a UE identifies a different cell to camp on that is not subject to the conflict, wherein the different cell is not as good a candidate for cell selection as one of the conflicting cells in terms of cell selection criteria, and camps on the identified cell.

PRIORITY CLAIM(S)

This application is a continuation of U.S. patent application Ser. No.16/714,665, filed on Dec. 13, 2019, and entitled “Resolution of PagingCollisions in Multi-SIM and C-RAT Operation”, which claims priority toand benefit of U.S. Provisional Patent Application Ser. No. 62/780,129,filed on Dec. 14, 2018, and entitled “Resolution of Paging Collisions inMulti-SIM and C-RAT Operation”, the contents of both of which are herebyincorporated by reference in their entirety as if fully set forth belowand for all applicable purposes.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure relate to wireless communications, andmore particularly, to techniques for resolving the collision of pagingoccurrences when a UE is camped on more than one cell.

DESCRIPTION OF RELATED ART

Wireless communication systems are widely deployed to provide varioustelecommunication services such as telephony, video, data, messaging,broadcasts, etc. These wireless communication systems may employmultiple-access technologies capable of supporting communication withmultiple users by sharing available system resources (e.g., bandwidth,transmit power, etc.). Examples of such multiple-access systems include3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE)systems, LTE Advanced (LTE-A) systems, code division multiple access(CDMA) systems, time division multiple access (TDMA) systems, frequencydivision multiple access (FDMA) systems, orthogonal frequency divisionmultiple access (OFDMA) systems, single-carrier frequency divisionmultiple access (SC-FDMA) systems, and time division synchronous codedivision multiple access (TD-SCDMA) systems, to name a few.

In some examples, a wireless multiple-access communication system mayinclude a number of base stations (BSs), which are each capable ofsimultaneously supporting communication for multiple communicationdevices, otherwise known as user equipments (UEs). In an LTE or LTE-Anetwork, a set of one or more base stations may define an eNodeB (eNB).In other examples (e.g., in a next generation, a new radio (NR), or 5Gnetwork), a wireless multiple access communication system may include anumber of distributed units (DUs) (e.g., edge units (EUs), edge nodes(ENs), radio heads (RHs), smart radio heads (SRHs), transmissionreception points (TRPs), etc.) in communication with a number of centralunits (CUs) (e.g., central nodes (CNs), access node controllers (ANCs),etc.), where a set of one or more DUs, in communication with a CU, maydefine an access node (e.g., which may be referred to as a BS, 5G NB,next generation NodeB (gNB or gNodeB), transmission reception point(TRP), etc.). A BS or DU may communicate with a set of UEs on downlinkchannels (e.g., for transmissions from a BS or DU to a UE) and uplinkchannels (e.g., for transmissions from a UE to BS or DU).

These multiple access technologies have been adopted in varioustelecommunication standards to provide a common protocol that enablesdifferent wireless devices to communicate on a municipal, national,regional, and even global level. NR (e.g., new radio or 5G) is anexample of an emerging telecommunication standard. NR is a set ofenhancements to the LTE mobile standard promulgated by 3GPP. NR isdesigned to better support mobile broadband Internet access by improvingspectral efficiency, lowering costs, improving services, making use ofnew spectrum, and better integrating with other open standards usingOFDMA with a cyclic prefix (CP) on the downlink (DL) and on the uplink(UL). To these ends, NR supports beamforming, multiple-inputmultiple-output (MIMO) antenna technology, and carrier aggregation.

However, as the demand for mobile broadband access continues toincrease, there exists a need for further improvements in NR and LTEtechnology. Preferably, these improvements should be applicable to othermulti-access technologies and the telecommunication standards thatemploy these technologies.

BRIEF SUMMARY

The systems, methods, and devices of the disclosure each have severalaspects, no single one of which is solely responsible for its desirableattributes. Without limiting the scope of this disclosure as expressedby the claims which follow, some features will now be discussed briefly.After considering this discussion, and particularly after reading thesection entitled “Detailed Description” one will understand how thefeatures of this disclosure provide advantages that include improvedcommunications between access points and stations in a wireless network.

Certain aspects provide a method for wireless communication by a userequipment (UE). The method generally includes detecting, based on pagingconfigurations, a conflict between configured paging occasions of atleast two cells on which the UE is camped and signaling an indication ofthe conflict to at least one of the cells and receiving informationregarding a new paging configuration designed to resolve the conflict.

Certain aspects provide a method for wireless communication by a networkentity. The method generally includes detecting, based on pagingconfigurations, a conflict between configured paging occasions of atleast two cells on which a user equipment (UE) is camped and providinginformation regarding a new paging configuration designed to resolve theconflict.

Certain aspects provide a method for wireless communication by a userequipment (UE). The method generally includes detecting, based on pagingconfigurations, a conflict between configured paging occasions of atleast two cells on which the UE is camped, receiving information from atleast one of the cells regarding a plurality of possible pagingoccasions for that cell, and monitoring for paging in one of thepossible paging occasions not subject to the conflict.

Certain aspects provide a method for wireless communication by a networkentity. The method generally includes signaling information to a userequipment (UE) regarding a plurality of possible paging occasions andpaging the UE in the possible paging occasions.

Certain aspects provide a method for wireless communication by a userequipment (UE). The method generally includes detecting, based on pagingconfigurations, a conflict between configured paging occasions of atleast two cells on which the UE is camped, identifying a different cellto camp on that is not subject to the conflict, wherein the differentcell is not as good a candidate for cell selection as one of theconflicting cells in terms of cell selection criteria, and camping onthe identified cell.

Certain aspects provide means for, apparatus, and/or computer readablemedium having computer executable code stored thereon, for techniquesdescribed above.

To the accomplishment of the foregoing and related ends, the one or moreaspects comprise the features hereinafter fully described andparticularly pointed out in the claims. The following description andthe appended drawings set forth in detail certain illustrative featuresof the one or more aspects. These features are indicative, however, ofbut a few of the various ways in which the principles of various aspectsmay be employed.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the manner in which the above-recited features of the presentdisclosure can be understood in detail, a more particular description,briefly summarized above, may be had by reference to aspects, some ofwhich are illustrated in the drawings. It is to be noted, however, thatthe appended drawings illustrate only certain typical aspects of thisdisclosure and are therefore not to be considered limiting of its scope,for the description may admit to other equally effective aspects.

FIG. 1 is a block diagram conceptually illustrating an exampletelecommunications system, in accordance with certain aspects of thepresent disclosure.

FIG. 2 is a block diagram illustrating an example logical architectureof a distributed radio access network (RAN), in accordance with certainaspects of the present disclosure.

FIG. 3 is a diagram illustrating an example physical architecture of adistributed RAN, in accordance with certain aspects of the presentdisclosure.

FIG. 4 is a block diagram conceptually illustrating a design of anexample base station (BS) and user equipment (UE), in accordance withcertain aspects of the present disclosure.

FIG. 5 is a diagram showing examples for implementing a communicationprotocol stack, in accordance with certain aspects of the presentdisclosure.

FIG. 6 illustrates an example of a frame format for a new radio (NR)system, in accordance with certain aspects of the present disclosure.

FIG. 7 is a flow diagram illustrating example operations that may beperformed by a UE, in accordance with certain aspects of the presentdisclosure.

FIG. 8 is a flow diagram illustrating example operations that may beperformed by a network entity, in accordance with certain aspects of thepresent disclosure.

FIG. 9 is a flow diagram illustrating example operations that may beperformed by a UE, in accordance with certain aspects of the presentdisclosure.

FIG. 10 is a flow diagram illustrating example operations that may beperformed by a network entity, in accordance with certain aspects of thepresent disclosure.

FIG. 11 is a flow diagram illustrating example operations that may beperformed by a UE, in accordance with certain aspects of the presentdisclosure.

To facilitate understanding, identical reference numerals have beenused, where possible, to designate identical elements that are common tothe figures. It is contemplated that elements disclosed in one aspectmay be beneficially utilized on other aspects without specificrecitation.

DETAILED DESCRIPTION

Aspects of the present disclosure provide apparatus, methods, processingsystems, and computer readable mediums for resolving the collision ofpaging occurrences when a UE is camped on more than one cell. Thetechniques may be implemented in wireless systems in which a UE may becamped on multiple cells, which may be of the same or different radioaccess technologies (RATs).

As used herein, the term camping generally means a UE has found asuitable cell, based on an available frequency band (e.g., PSS and SSS),found the physical cell ID, and decoded PBCH and SIBs to obtain therequired information for initial access to the cell. In other words, theUE is ready to access the cell but may be waiting to actually establisha connection.

The following description provides examples, and is not limiting of thescope, applicability, or examples set forth in the claims. Changes maybe made in the function and arrangement of elements discussed withoutdeparting from the scope of the disclosure. Various examples may omit,substitute, or add various procedures or components as appropriate. Forinstance, the methods described may be performed in an order differentfrom that described, and various steps may be added, omitted, orcombined. Also, features described with respect to some examples may becombined in some other examples. For example, an apparatus may beimplemented or a method may be practiced using any number of the aspectsset forth herein. In addition, the scope of the disclosure is intendedto cover such an apparatus or method which is practiced using otherstructure, functionality, or structure and functionality in addition to,or other than, the various aspects of the disclosure set forth herein.It should be understood that any aspect of the disclosure disclosedherein may be embodied by one or more elements of a claim. The word“exemplary” is used herein to mean “serving as an example, instance, orillustration.” Any aspect described herein as “exemplary” is notnecessarily to be construed as preferred or advantageous over otheraspects.

The techniques described herein may be used for various wirelesscommunication technologies, such as LTE, CDMA, TDMA, FDMA, OFDMA,SC-FDMA and other networks. The terms “network” and “system” are oftenused interchangeably. A CDMA network may implement a radio technologysuch as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRAincludes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000covers IS-2000, IS-95 and IS-856 standards. A TDMA network may implementa radio technology such as Global System for Mobile Communications(GSM). An OFDMA network may implement a radio technology such as NR(e.g. 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRAand E-UTRA are part of Universal Mobile Telecommunication System (UMTS).

New Radio (NR) is an emerging wireless communications technology underdevelopment in conjunction with the 5G Technology Forum (5GTF). 3GPPLong Term Evolution (LTE) and LTE-Advanced (LTE-A) are releases of UMTSthat use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described indocuments from an organization named “3rd Generation PartnershipProject” (3GPP). cdma2000 and UMB are described in documents from anorganization named “3rd Generation Partnership Project 2” (3GPP2). Thetechniques described herein may be used for the wireless networks andradio technologies mentioned above as well as other wireless networksand radio technologies. For clarity, while aspects may be describedherein using terminology commonly associated with 3G and/or 4G wirelesstechnologies, aspects of the present disclosure can be applied in othergeneration-based communication systems, such as 5G and later, includingNR technologies.

New radio (NR) access (e.g., 5G technology) may support various wirelesscommunication services, such as enhanced mobile broadband (eMBB)targeting wide bandwidth (e.g., 80 MHz or beyond), millimeter wave (mmW)targeting high carrier frequency (e.g., 25 GHz or beyond), massivemachine type communications MTC (mMTC) targeting non-backward compatibleMTC techniques, and/or mission critical targeting ultra-reliablelow-latency communications (URLLC). These services may include latencyand reliability requirements. These services may also have differenttransmission time intervals (TTI) to meet respective quality of service(QoS) requirements. In addition, these services may co-exist in the samesubframe.

Example Wireless Communications System

FIG. 1 illustrates an example wireless communication network 100 inwhich aspects of the present disclosure may be performed. For example,the wireless communication network 100 may be a New Radio (NR) or 5Gnetwork, with one or more UEs 120 configured to perform operations ofFIGS. 7, 9, and/or 11 to resolve the collision of paging occurrenceswhen a UE is camped on more than one cell. In some cases, such cells maybe served by a base station 110 configured to perform operations ofFIGS. 8 and/or 10).

As illustrated in FIG. 1, the wireless communication network 100 mayinclude a number of base stations (BSs) 110 and other network entities.A BS may be a station that communicates with user equipments (UEs). EachBS 110 may provide communication coverage for a particular geographicarea. In 3GPP, the term “cell” can refer to a coverage area of a Node B(NB) and/or a NB subsystem serving this coverage area, depending on thecontext in which the term is used. In NR systems, the term “cell” andnext generation NodeB (gNB or gNodeB), NR BS, 5G NB, access point (AP),or transmission reception point (TRP) may be interchangeable. In someexamples, a cell may not necessarily be stationary, and the geographicarea of the cell may move according to the location of a mobile BS. Insome examples, the base stations may be interconnected to one anotherand/or to one or more other base stations or network nodes (not shown)in wireless communication network 100 through various types of backhaulinterfaces, such as a direct physical connection, a wireless connection,a virtual network, or the like using any suitable transport network.

In general, any number of wireless networks may be deployed in a givengeographic area. Each wireless network may support a particular radioaccess technology (RAT) and may operate on one or more frequencies. ARAT may also be referred to as a radio technology, an air interface,etc. A frequency may also be referred to as a carrier, a subcarrier, afrequency channel, a tone, a subband, etc. Each frequency may support asingle RAT in a given geographic area in order to avoid interferencebetween wireless networks of different RATs. In some cases, NR or 5G RATnetworks may be deployed.

A BS may provide communication coverage for a macro cell, a pico cell, afemto cell, and/or other types of cells. A macro cell may cover arelatively large geographic area (e.g., several kilometers in radius)and may allow unrestricted access by UEs with service subscription. Apico cell may cover a relatively small geographic area and may allowunrestricted access by UEs with service subscription. A femto cell maycover a relatively small geographic area (e.g., a home) and may allowrestricted access by UEs having an association with the femto cell(e.g., UEs in a Closed Subscriber Group (CSG), UEs for users in thehome, etc.). A BS for a macro cell may be referred to as a macro BS. ABS for a pico cell may be referred to as a pico BS. A BS for a femtocell may be referred to as a femto BS or a home BS. In the example shownin FIG. 1, the BSs 110 a, 110 b and 110 c may be macro BSs for the macrocells 102 a, 102 b and 102 c, respectively. The BS 110 x may be a picoBS for a pico cell 102 x. The BSs 110 y and 110 z may be femto BSs forthe femto cells 102 y and 102 z, respectively. ABS may support one ormultiple (e.g., three) cells.

Wireless communication network 100 may also include relay stations. Arelay station is a station that receives a transmission of data and/orother information from an upstream station (e.g., a BS or a UE) andsends a transmission of the data and/or other information to adownstream station (e.g., a UE or a BS). A relay station may also be aUE that relays transmissions for other UEs. In the example shown in FIG.1, a relay station 110 r may communicate with the BS 110 a and a UE 120r in order to facilitate communication between the BS 110 a and the UE120 r. A relay station may also be referred to as a relay BS, a relay,etc.

Wireless communication network 100 may be a heterogeneous network thatincludes BSs of different types, e.g., macro BS, pico BS, femto BS,relays, etc. These different types of BSs may have different transmitpower levels, different coverage areas, and different impact oninterference in the wireless communication network 100. For example,macro BS may have a high transmit power level (e.g., 20 Watts) whereaspico BS, femto BS, and relays may have a lower transmit power level(e.g., 1 Watt).

Wireless communication network 100 may support synchronous orasynchronous operation. For synchronous operation, the BSs may havesimilar frame timing, and transmissions from different BSs may beapproximately aligned in time. For asynchronous operation, the BSs mayhave different frame timing, and transmissions from different BSs maynot be aligned in time. The techniques described herein may be used forboth synchronous and asynchronous operation.

A network controller 130 may couple to a set of BSs and providecoordination and control for these BSs. The network controller 130 maycommunicate with the BSs 110 via a backhaul. The BSs 110 may alsocommunicate with one another (e.g., directly or indirectly) via wirelessor wireline backhaul.

The UEs 120 (e.g., 120 x, 120 y, etc.) may be dispersed throughout thewireless communication network 100, and each UE may be stationary ormobile. A UE may also be referred to as a mobile station, a terminal, anaccess terminal, a subscriber unit, a station, a Customer PremisesEquipment (CPE), a cellular phone, a smart phone, a personal digitalassistant (PDA), a wireless modem, a wireless communication device, ahandheld device, a laptop computer, a cordless phone, a wireless localloop (WLL) station, a tablet computer, a camera, a gaming device, anetbook, a smartbook, an ultrabook, an appliance, a medical device ormedical equipment, a biometric sensor/device, a wearable device such asa smart watch, smart clothing, smart glasses, a smart wrist band, smartjewelry (e.g., a smart ring, a smart bracelet, etc.), an entertainmentdevice (e.g., a music device, a video device, a satellite radio, etc.),a vehicular component or sensor, a smart meter/sensor, industrialmanufacturing equipment, a global positioning system device, or anyother suitable device that is configured to communicate via a wirelessor wired medium. Some UEs may be considered machine-type communication(MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include,for example, robots, drones, remote devices, sensors, meters, monitors,location tags, etc., that may communicate with a BS, another device(e.g., remote device), or some other entity. A wireless node mayprovide, for example, connectivity for or to a network (e.g., a widearea network such as Internet or a cellular network) via a wired orwireless communication link. Some UEs may be consideredInternet-of-Things (IoT) devices, which may be narrowband IoT (NB-IoT)devices.

Certain wireless networks (e.g., LTE) utilize orthogonal frequencydivision multiplexing (OFDM) on the downlink and single-carrierfrequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDMpartition the system bandwidth into multiple (K) orthogonal subcarriers,which are also commonly referred to as tones, bins, etc. Each subcarriermay be modulated with data. In general, modulation symbols are sent inthe frequency domain with OFDM and in the time domain with SC-FDM. Thespacing between adjacent subcarriers may be fixed, and the total numberof subcarriers (K) may be dependent on the system bandwidth. Forexample, the spacing of the subcarriers may be 15 kHz and the minimumresource allocation (called a “resource block” (RB)) may be 12subcarriers (or 180 kHz). Consequently, the nominal Fast FourierTransfer (FFT) size may be equal to 128, 256, 512, 1024 or 2048 forsystem bandwidth of 1.25, 2.5, 5, 10, or 20 megahertz (MHz),respectively. The system bandwidth may also be partitioned intosubbands. For example, a subband may cover 1.08 MHz (i.e., 6 resourceblocks), and there may be 1, 2, 4, 8, or 16 subbands for systembandwidth of 1.25, 2.5, 5, 10 or 20 MHz, respectively.

While aspects of the examples described herein may be associated withLTE technologies, aspects of the present disclosure may be applicablewith other wireless communications systems, such as NR. NR may utilizeOFDM with a CP on the uplink and downlink and include support forhalf-duplex operation using TDD. Beamforming may be supported and beamdirection may be dynamically configured. MIMO transmissions withprecoding may also be supported. MIMO configurations in the DL maysupport up to 8 transmit antennas with multi-layer DL transmissions upto 8 streams and up to 2 streams per UE. Multi-layer transmissions withup to 2 streams per UE may be supported. Aggregation of multiple cellsmay be supported with up to 8 serving cells.

In some examples, access to the air interface may be scheduled. Ascheduling entity (e.g., a BS) allocates resources for communicationamong some or all devices and equipment within its service area or cell.The scheduling entity may be responsible for scheduling, assigning,reconfiguring, and releasing resources for one or more subordinateentities. That is, for scheduled communication, subordinate entitiesutilize resources allocated by the scheduling entity. Base stations arenot the only entities that may function as a scheduling entity. In someexamples, a UE may function as a scheduling entity and may scheduleresources for one or more subordinate entities (e.g., one or more otherUEs), and the other UEs may utilize the resources scheduled by the UEfor wireless communication. In some examples, a UE may function as ascheduling entity in a peer-to-peer (P2P) network, and/or in a meshnetwork. In a mesh network example, UEs may communicate directly withone another in addition to communicating with a scheduling entity.

In FIG. 1, a solid line with double arrows indicates desiredtransmissions between a UE and a serving BS, which is a BS designated toserve the UE on the downlink and/or uplink. A finely dashed line withdouble arrows indicates interfering transmissions between a UE and a BS.

FIG. 2 illustrates an example logical architecture of a distributedRadio Access Network (RAN) 200, which may be implemented in the wirelesscommunication network 100 illustrated in FIG. 1. A 5G access node 206may include an access node controller (ANC) 202. ANC 202 may be acentral unit (CU) of the distributed RAN 200. The backhaul interface tothe Next Generation Core Network (NG-CN) 204 may terminate at ANC 202.The backhaul interface to neighboring next generation access Nodes(NG-ANs) 210 may terminate at ANC 202. ANC 202 may include one or moreTRPs 208 (e.g., cells, BSs, gNBs, etc.).

The TRPs 208 may be a distributed unit (DU). TRPs 208 may be connectedto a single ANC (e.g., ANC 202) or more than one ANC (not illustrated).For example, for RAN sharing, radio as a service (RaaS), and servicespecific AND deployments, TRPs 208 may be connected to more than oneANC. TRPs 208 may each include one or more antenna ports. TRPs 208 maybe configured to individually (e.g., dynamic selection) or jointly(e.g., joint transmission) serve traffic to a UE.

The logical architecture of distributed RAN 200 may support fronthaulingsolutions across different deployment types. For example, the logicalarchitecture may be based on transmit network capabilities (e.g.,bandwidth, latency, and/or jitter).

The logical architecture of distributed RAN 200 may share featuresand/or components with LTE. For example, next generation access node(NG-AN) 210 may support dual connectivity with NR and may share a commonfronthaul for LTE and NR.

The logical architecture of distributed RAN 200 may enable cooperationbetween and among TRPs 208, for example, within a TRP and/or across TRPsvia ANC 202. An inter-TRP interface may not be used.

Logical functions may be dynamically distributed in the logicalarchitecture of distributed RAN 200. As will be described in more detailwith reference to FIG. 5, the Radio Resource Control (RRC) layer, PacketData Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer,Medium Access Control (MAC) layer, and a Physical (PHY) layers may beadaptably placed at the DU (e.g., TRP 208) or CU (e.g., ANC 202).

FIG. 3 illustrates an example physical architecture of a distributed RAN300, according to aspects of the present disclosure. A centralized corenetwork unit (C-CU) 302 may host core network functions. C-CU 302 may becentrally deployed. C-CU 302 functionality may be offloaded (e.g., toadvanced wireless services (AWS)), in an effort to handle peak capacity.

A centralized RAN unit (C-RU) 304 may host one or more ANC functions.Optionally, the C-RU 304 may host core network functions locally. TheC-RU 304 may have distributed deployment. The C-RU 304 may be close tothe network edge.

A DU 306 may host one or more TRPs (Edge Node (EN), an Edge Unit (EU), aRadio Head (RH), a Smart Radio Head (SRH), or the like). The DU may belocated at edges of the network with radio frequency (RF) functionality.

FIG. 4 illustrates example components of BS 110 and UE 120 (as depictedin FIG. 1), which may be used to implement aspects of the presentdisclosure. For example, antennas 452, processors 466, 458, 464, and/orcontroller/processor 480 of the UE 120 may be used to perform operationsof FIGS. 7, 9, and/or 11. Similarly, antennas 434, processors 420, 430,438, and/or controller/processor 440 of the BS 110 may be used toperform operations of FIGS. 8 and/or 10.

At the BS 110, a transmit processor 420 may receive data from a datasource 412 and control information from a controller/processor 440. Thecontrol information may be for the physical broadcast channel (PBCH),physical control format indicator channel (PCFICH), physical hybrid ARQindicator channel (PHICH), physical downlink control channel (PDCCH),group common PDCCH (GC PDCCH), etc. The data may be for the physicaldownlink shared channel (PDSCH), etc. The processor 420 may process(e.g., encode and symbol map) the data and control information to obtaindata symbols and control symbols, respectively. The processor 420 mayalso generate reference symbols, e.g., for the primary synchronizationsignal (PSS), secondary synchronization signal (SSS), and cell-specificreference signal (CRS). A transmit (TX) multiple-input multiple-output(MIMO) processor 430 may perform spatial processing (e.g., precoding) onthe data symbols, the control symbols, and/or the reference symbols, ifapplicable, and may provide output symbol streams to the modulators(MODs) 432 a through 432 t. Each modulator 432 may process a respectiveoutput symbol stream (e.g., for OFDM, etc.) to obtain an output samplestream. Each modulator may further process (e.g., convert to analog,amplify, filter, and upconvert) the output sample stream to obtain adownlink signal. Downlink signals from modulators 432 a through 432 tmay be transmitted via the antennas 434 a through 434 t, respectively.

At the UE 120, the antennas 452 a through 452 r may receive the downlinksignals from the base station 110 and may provide received signals tothe demodulators (DEMODs) in transceivers 454 a through 454 r,respectively. Each demodulator 454 may condition (e.g., filter, amplify,downconvert, and digitize) a respective received signal to obtain inputsamples. Each demodulator may further process the input samples (e.g.,for OFDM, etc.) to obtain received symbols. A MIMO detector 456 mayobtain received symbols from all the demodulators 454 a through 454 r,perform MIMO detection on the received symbols if applicable, andprovide detected symbols. A receive processor 458 may process (e.g.,demodulate, deinterleave, and decode) the detected symbols, providedecoded data for the UE 120 to a data sink 460, and provide decodedcontrol information to a controller/processor 480.

On the uplink, at UE 120, a transmit processor 464 may receive andprocess data (e.g., for the physical uplink shared channel (PUSCH)) froma data source 462 and control information (e.g., for the physical uplinkcontrol channel (PUCCH) from the controller/processor 480. The transmitprocessor 464 may also generate reference symbols for a reference signal(e.g., for the sounding reference signal (SRS)). The symbols from thetransmit processor 464 may be precoded by a TX MIMO processor 466 ifapplicable, further processed by the demodulators in transceivers 454 athrough 454 r (e.g., for SC-FDM, etc.), and transmitted to the basestation 110. At the BS 110, the uplink signals from the UE 120 may bereceived by the antennas 434, processed by the modulators 432, detectedby a MIMO detector 436 if applicable, and further processed by a receiveprocessor 438 to obtain decoded data and control information sent by theUE 120. The receive processor 438 may provide the decoded data to a datasink 439 and the decoded control information to the controller/processor440.

The controllers/processors 440 and 480 may direct the operation at theBS 110 and the UE 120, respectively. The processor 440 and/or otherprocessors and modules at the BS 110 may perform or direct the executionof processes for the techniques described herein. The memories 442 and482 may store data and program codes for BS 110 and UE 120,respectively. A scheduler 444 may schedule UEs for data transmission onthe downlink and/or uplink.

FIG. 5 illustrates a diagram 500 showing examples for implementing acommunications protocol stack, according to aspects of the presentdisclosure. The illustrated communications protocol stacks may beimplemented by devices operating in a wireless communication system,such as a 5G system (e.g., a system that supports uplink-basedmobility). Diagram 500 illustrates a communications protocol stackincluding a RRC layer 510, a PDCP layer 515, a RLC layer 520, a MAClayer 525, and a PHY layer 530. In various examples, the layers of aprotocol stack may be implemented as separate modules of software,portions of a processor or ASIC, portions of non-collocated devicesconnected by a communications link, or various combinations thereof.Collocated and non-collocated implementations may be used, for example,in a protocol stack for a network access device (e.g., ANs, CUs, and/orDUs) or a UE.

A first option 505-a shows a split implementation of a protocol stack,in which implementation of the protocol stack is split between acentralized network access device (e.g., an ANC 202 in FIG. 2) anddistributed network access device (e.g., DU 208 in FIG. 2). In the firstoption 505-a, an RRC layer 510 and a PDCP layer 515 may be implementedby the central unit, and an RLC layer 520, a MAC layer 525, and a PHYlayer 530 may be implemented by the DU. In various examples the CU andthe DU may be collocated or non-collocated. The first option 505-a maybe useful in a macro cell, micro cell, or pico cell deployment.

A second option 505-b shows a unified implementation of a protocolstack, in which the protocol stack is implemented in a single networkaccess device. In the second option, RRC layer 510, PDCP layer 515, RLClayer 520, MAC layer 525, and PHY layer 530 may each be implemented bythe AN. The second option 505-b may be useful in, for example, a femtocell deployment.

Regardless of whether a network access device implements part or all ofa protocol stack, a UE may implement an entire protocol stack as shownin 505-c (e.g., the RRC layer 510, the PDCP layer 515, the RLC layer520, the MAC layer 525, and the PHY layer 530).

In LTE, the basic transmission time interval (TTI) or packet duration isthe 1 ms subframe. In NR, a subframe is still 1 ms, but the basic TTI isreferred to as a slot. A subframe contains a variable number of slots(e.g., 1, 2, 4, 8, 16, . . . slots) depending on the subcarrier spacing.The NR RB is 12 consecutive frequency subcarriers. NR may support a basesubcarrier spacing of 15 KHz and other subcarrier spacing may be definedwith respect to the base subcarrier spacing, for example, 30 kHz, 60kHz, 120 kHz, 240 kHz, etc. The symbol and slot lengths scale with thesubcarrier spacing. The CP length also depends on the subcarrierspacing.

FIG. 6 is a diagram showing an example of a frame format 600 for NR. Thetransmission timeline for each of the downlink and uplink may bepartitioned into units of radio frames. Each radio frame may have apredetermined duration (e.g., 10 ms) and may be partitioned into 10subframes, each of 1 ms, with indices of 0 through 9. Each subframe mayinclude a variable number of slots depending on the subcarrier spacing.Each slot may include a variable number of symbol periods (e.g., 7 or 14symbols) depending on the subcarrier spacing. The symbol periods in eachslot may be assigned indices. A mini-slot, which may be referred to as asub-slot structure, refers to a transmit time interval having a durationless than a slot (e.g., 2, 3, or 4 symbols).

Each symbol in a slot may indicate a link direction (e.g., DL, UL, orflexible) for data transmission and the link direction for each subframemay be dynamically switched. The link directions may be based on theslot format. Each slot may include DL/UL data as well as DL/UL controlinformation.

In NR, a synchronization signal (SS) block is transmitted. The SS blockincludes a PSS, a SSS, and a two symbol PBCH. The SS block can betransmitted in a fixed slot location, such as the symbols 0-3 as shownin FIG. 6. The PSS and SSS may be used by UEs for cell search andacquisition. The PSS may provide half-frame timing, the SS may providethe CP length and frame timing. The PSS and SSS may provide the cellidentity. The PBCH carries some basic system information, such asdownlink system bandwidth, timing information within radio frame, SSburst set periodicity, system frame number, etc. The SS blocks may beorganized into SS bursts to support beam sweeping. Further systeminformation such as, remaining minimum system information (RMSI), systeminformation blocks (SIBs), other system information (OSI) can betransmitted on a physical downlink shared channel (PDSCH) in certainsubframes. The SS block can be transmitted up to sixty-four times, forexample, with up to sixty-four different beam directions for mmW. The upto sixty-four transmissions of the SS block are referred to as the SSburst set. SS blocks in an SS burst set are transmitted in the samefrequency region, while SS blocks in different SS bursts sets can betransmitted at different frequency locations.

In some circumstances, two or more subordinate entities (e.g., UEs) maycommunicate with each other using sidelink signals. Real-worldapplications of such sidelink communications may include public safety,proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V)communications, Internet of Everything (IoE) communications, IoTcommunications, mission-critical mesh, and/or various other suitableapplications. Generally, a sidelink signal may refer to a signalcommunicated from one subordinate entity (e.g., UE1) to anothersubordinate entity (e.g., UE2) without relaying that communicationthrough the scheduling entity (e.g., UE or BS), even though thescheduling entity may be utilized for scheduling and/or controlpurposes. In some examples, the sidelink signals may be communicatedusing a licensed spectrum (unlike wireless local area networks, whichtypically use an unlicensed spectrum).

A UE may operate in various radio resource configurations, including aconfiguration associated with transmitting pilots using a dedicated setof resources (e.g., a radio resource control (RRC) dedicated state,etc.) or a configuration associated with transmitting pilots using acommon set of resources (e.g., an RRC common state, etc.). Whenoperating in the RRC dedicated state, the UE may select a dedicated setof resources for transmitting a pilot signal to a network. Whenoperating in the RRC common state, the UE may select a common set ofresources for transmitting a pilot signal to the network. In eithercase, a pilot signal transmitted by the UE may be received by one ormore network access devices, such as an AN, or a DU, or portionsthereof. Each receiving network access device may be configured toreceive and measure pilot signals transmitted on the common set ofresources, and also receive and measure pilot signals transmitted ondedicated sets of resources allocated to the UEs for which the networkaccess device is a member of a monitoring set of network access devicesfor the UE. One or more of the receiving network access devices, or a CUto which receiving network access device(s) transmit the measurements ofthe pilot signals, may use the measurements to identify serving cellsfor the UEs, or to initiate a change of serving cell for one or more ofthe UEs.

Example Resolution of Paging Collisions

There are various types of scenarios where a UE may camp on multiplecells and need to monitor for paging in each, which may presentchallenges. For example, in C-RAT (concurrent RAT) and multi-SIMscenarios (e.g., where a UE uses different subscriber identificationmodules or SIMS in different networks or to have different phone numbersin a same network), a UE may not have the capability to receive data orsignaling simultaneously on both access links. A particular case isIdle/Inactive mobility where the UE camps on a cell on each RAT orpublic land mobile network (PLMN) while being able to receive pagingonly one at a time.

Exactly how paging occurrences are determined may vary depending on theparticular RAT. In LTE, the paging frame and occasion are calculatedbased on cell level paging parameters (DRX cycle, number of pagingoccasions in a cycle) and an international mobile subscriber identity(IMSI). Unfortunately, many cells in an area can use the same cellparameters, which makes it fairly likely that paging occasions willcollide if the UE camps on two LTE cells. As used herein, the termcollision refers to paging occasions in different cells that overlapsuch that a UE may only be able to monitor for paging in one of thecells during a paging occurrence subject to collision.

In NR, the UE identity used for paging is based on the last 10 digits ofa serving temporary mobile subscriber identity (S-TMSI) assigned the UE.Another difference compared to LTE is that the number of paging framesand number of paging occasions (PO) corresponding to a paging frame (PF)are configured separately. NR also allows configuring offsets for eachpaging occasion, making the placement of a paging occasion for a UE veryflexible.

Paging collisions may occur when a UE is dual camping on two NR or twoLTE cells or one NR and one LTE cell. For example, it is possible thatthe paging occasions can collide between cells. Since the paging cyclevalues are all 2{circumflex over ( )}n*10 ms, when collision happens, itwill repeat itself periodically even if the paging cycles are differentacross cells.

Aspects of the present disclosure provide various solutions that mayhelp address this paging collision problem. As a result, overall systemperformance and user experience may be improved, as end users may bereached sooner than if the paging collisions were not resolved.

The various solutions apply different signaling options. The varioussolutions may be applied to a wide variety of RAT systems such as NR,LTE, eLTE, as well as any inter-RAT deployment deploying a combinationof such RATs.

According to a first example solution, a UE signals the network when itdetects a paging collision, allowing the network to modify a pagingconfiguration for the UE in an effort to resolve the paging collision.

FIG. 7 is a flow diagram illustrating example operations 700 by a UE, inaccordance with this first example solution. The operations 700 may beperformed, for example, by a UE (e.g., such as a UE 120 in the wirelesscommunication network 100) for resolving paging collisions.

Operations 700 begin, at 702, by detecting, based on pagingconfigurations, a conflict between configured paging occasions of atleast two cells on which the UE is camped. At 704, the UE signals anindication of the conflict to at least one of the cells. At 706, the UEreceives information regarding a new paging configuration designed toresolve the conflict.

FIG. 8 is a flow diagram illustrating example operations 800 forwireless communications by a network, in accordance with this firstexample solution. In other words, operations 800 may be considerednetwork-side operations that are complementary to operations 700described above. The operations 800 may be performed, for example, by anetwork entity (e.g., such as a BS 110 in the wireless communicationnetwork 100) or TRP(s) for resolving paging collisions.

Operations 800 begin, at 802, by detecting, based on pagingconfigurations, a conflict between configured paging occasions of atleast two cells on which a user equipment (UE) is camped. At 804, thenetwork entity provides information regarding a new paging configurationdesigned to resolve the conflict.

According to this first example solution, the UE detects pagingcollisions (e.g., based on current paging configurations for multiplecells the UE is camped on), and informs one of the cells to resolve theconflict by essentially requesting a new configuration for pagingoccasions.

When camping on a cell, the UE detects that the paging occasionsconfigured by this cell conflicts with an existing paging configurationon another cell. In response, the UE may send an indication of thepaging collision to this cell.

In some cases, the indication may be provided via a (single bit) flag ormulti-bit format in an existing RRC message format, such as an RRCResume message for Inactive mode or RRC Setup Request message for Idlemode. A multi-bit indication may signal a request for a different pagingframe (PF) or a delta index for a different PF or a different pagingoccasion (PO) or a delta index for a different PO (as used herein, theterm delta index generally refers to a difference between a calculateindex according to a current configuration and the requested index).

In some cases, the indication may be sent in a newly defined RRC messageafter moving to Connected mode. This new RRC message may includeinformation on paging occasions in the other cell.

For Idle mode UEs, the gNB calculates the UE's initial PF and PO basedon a received 5G-S-TMSI (the leftmost 39 bits are sent in RRC SetupRequest which is sufficient for this calculation). To help resolvepaging collisions, however, additional information may be sent, such asthe rightmost 10 bits of the S-TMSI. This may be provided in a 2-stepprocess, provided msg3 is changed. In some cases instead of the leftmost39 bits, the content may be changed to provide the leftmost 29 bits andthe rightmost 10 bits, to keep the payload at 39 bits.

For Inactive mode UEs, the gNB may obtain the UE's 5G-S-TMSI fromanother network entity (e.g., an anchor gNB), for example, based on anI-RNTI signaled in an RRC Resume Request. In some cases, an Xn ContextRetrieve Request/Response may be modified to only deliver (the last 10digits of) 5the G-S-TMSI (assuming no UE context move).

For Idle mode UEs, the gNB may obtain the last 10 digits of 5G-S-TMSIvia an RRC Setup Request message, while the leftmost 39 bits may be sentin RRC Setup Request (as described above).

Regardless of how the gNB obtains the information, the UE then receivesa new paging configuration (e.g., with a new PF, a new PO, and/or a newPO starting offset). The PF and PO are calculated initially based onsignaled parameters in SIB1 and the UE identity and PO offset is alsobroadcasted for all UEs. This dedicated configuration allows the NW toover-write this calculation for this particular UE. The new PF or new POmay be signaled by the delta index (as compared to the original PF orPO), rather than signal the full value for security reasons. Thesignaling may happen via an RRC Release message for Inactive mode UEs(need to check Idle) or via an RRC Reject message for both Idle andInactive mode UEs.

According to a second example solution, a network entity broadcastsseveral PO locations where a UE can select a non-conflicting one in aneffort to resolve the paging collision.

FIG. 9 is a flow diagram illustrating example operations 900 by a UE, inaccordance with this second example solution. The operations 900 may beperformed, for example, by a UE (e.g., such as a UE 120 in the wirelesscommunication network 100) for resolving paging collisions.

The operations 900 begin, at 902, by detecting, based on pagingconfigurations, a conflict between configured paging occasions of atleast two cells on which the UE is camped. At 904, the UE receivesinformation from at least one of the cells regarding a plurality ofpossible paging occasions for that cell. At 906, the UE monitors forpaging in one of the possible paging occasions not subject to theconflict.

FIG. 10 is a flow diagram illustrating example operations 1000 forwireless communications by a network, in accordance with this secondexample solution. In other words, operations 1000 may be considerednetwork-side operations that are complementary to operations 900described above. The operations 1000 may be performed, for example, by anetwork entity (e.g., such as a BS 110 in the wireless communicationnetwork 100) or TRP(s) for resolving paging collisions.

The operations 1000 begin, at 1002, by signaling information to a userequipment (UE) regarding a plurality of possible paging occasions. At1004, the network entity pages the UE in the possible paging occasions.

According to this second example solution, a gNB may broadcast severalPO locations where a UE can select a non-conflicting PO location (onethat does not conflict with POs of another cell). This approach may beconsidered relatively simple from a signaling complexity and standardspecification point of view, albeit at the cost of paging overhead sincethe same UE has to be paged over multiple POs (as the gNB may not knowwhich POs the UE chooses to monitor).

In some cases, the gNB may broadcast a list of index values which can beadded to a PF and/or a PO to allow multiple PO locations for a UE (e.g.,as a delta with respect to an already calculated PF or PO). The gNB thenpages the UE on each of the possible PO locations, while the UE listensfor paging on one of the POs which do not conflict with the other cell.

In some cases, for Inactive mode, an anchor gNB may send a modified UEidentity index to the other cells in a RAN based notification area(RNA). Assuming all the cells in an RNA use the same pagingconfiguration, the anchor gNB may thus know that a UE has pagingconflicts. In some cases, this UE identity index is the last 10 digitsfor 5G-S-TMSI and the anchor gNB can send a different value which canallow for non-conflicting PF and PO at the cells in the RNA. In somecases, the UE and anchor gNB may agree on this modified UE value, forexample, when the UE was connected to the anchor gNB. This value may beupdated when appropriate, for example, during RNA updates.

According to a third example solution, a UE may choose to move toanother cell to resolve a paging collision.

FIG. 11 is a flow diagram illustrating example operations 1100 forwireless communications by a UE, in accordance with certain aspects ofthe present disclosure. The operations 1100 may be performed, forexample, by a UE (e.g., such as a UE 120 in the wireless communicationnetwork 100) for resolving paging collisions according to this thirdexample solution.

The operations 1100 begin, at 1102, by detecting, based on pagingconfigurations, a conflict between configured paging occasions of atleast two cells on which the UE is camped. At 1104, the UE identifies adifferent cell to camp on that is not subject to the conflict, whereinthe different cell is not as good a candidate for cell selection as oneof the conflicting cells in terms of cell selection criteria. At 1106,the UE camps on the identified cell.

According to this third example solution, for example, the UE can try tocamp on another cell without paging collisions. Because this other cellmay not be the best candidate cell to camp on in terms of signalquality, this approach may result in some performance degradation forboth the UE and the network. This performance degradation may not be assevere, however, as performance degradation caused if the UE isunreachable due to a paging collision. A UE may camp on another cellwhen the chosen best one has a paging collision and may choose the othercell, for example, after reading SIB1s of cells during cell reselectionand/or by reading SIB1 of the best cell and then performing cellreselection again.

The methods disclosed herein comprise one or more steps or actions forachieving the methods. The method steps and/or actions may beinterchanged with one another without departing from the scope of theclaims. In other words, unless a specific order of steps or actions isspecified, the order and/or use of specific steps and/or actions may bemodified without departing from the scope of the claims.

As used herein, a phrase referring to “at least one of” a list of itemsrefers to any combination of those items, including single members. Asan example, “at least one of: a, b, or c” is intended to cover a, b, c,a-b, a-c, b-c, and a-b-c, as well as any combination with multiples ofthe same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b,b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c).

As used herein, the term “determining” encompasses a wide variety ofactions. For example, “determining” may include calculating, computing,processing, deriving, investigating, looking up (e.g., looking up in atable, a database or another data structure), ascertaining and the like.Also, “determining” may include receiving (e.g., receiving information),accessing (e.g., accessing data in a memory) and the like. Also,“determining” may include resolving, selecting, choosing, establishingand the like.

The previous description is provided to enable any person skilled in theart to practice the various aspects described herein. Variousmodifications to these aspects will be readily apparent to those skilledin the art, and the generic principles defined herein may be applied toother aspects. Thus, the claims are not intended to be limited to theaspects shown herein, but is to be accorded the full scope consistentwith the language of the claims, wherein reference to an element in thesingular is not intended to mean “one and only one” unless specificallyso stated, but rather “one or more.” Unless specifically statedotherwise, the term “some” refers to one or more. All structural andfunctional equivalents to the elements of the various aspects describedthroughout this disclosure that are known or later come to be known tothose of ordinary skill in the art are expressly incorporated herein byreference and are intended to be encompassed by the claims. Moreover,nothing disclosed herein is intended to be dedicated to the publicregardless of whether such disclosure is explicitly recited in theclaims. No claim element is to be construed under the provisions of 35U.S.C. § 112(f) unless the element is expressly recited using the phrase“means for” or, in the case of a method claim, the element is recitedusing the phrase “step for.”

The various operations of methods described above may be performed byany suitable means capable of performing the corresponding functions.The means may include various hardware and/or software component(s)and/or module(s), including, but not limited to a circuit, anapplication specific integrated circuit (ASIC), or processor. Generally,where there are operations illustrated in figures, those operations mayhave corresponding counterpart means-plus-function components withsimilar numbering.

The various illustrative logical blocks, modules and circuits describedin connection with the present disclosure may be implemented orperformed with a general purpose processor, a digital signal processor(DSP), an application specific integrated circuit (ASIC), a fieldprogrammable gate array (FPGA) or other programmable logic device (PLD),discrete gate or transistor logic, discrete hardware components, or anycombination thereof designed to perform the functions described herein.A general-purpose processor may be a microprocessor, but in thealternative, the processor may be any commercially available processor,controller, microcontroller, or state machine. A processor may also beimplemented as a combination of computing devices, e.g., a combinationof a DSP and a microprocessor, a plurality of microprocessors, one ormore microprocessors in conjunction with a DSP core, or any other suchconfiguration.

If implemented in hardware, an example hardware configuration maycomprise a processing system in a wireless node. The processing systemmay be implemented with a bus architecture. The bus may include anynumber of interconnecting buses and bridges depending on the specificapplication of the processing system and the overall design constraints.The bus may link together various circuits including a processor,machine-readable media, and a bus interface. The bus interface may beused to connect a network adapter, among other things, to the processingsystem via the bus. The network adapter may be used to implement thesignal processing functions of the PHY layer. In the case of a userterminal 120 (see FIG. 1), a user interface (e.g., keypad, display,mouse, joystick, etc.) may also be connected to the bus. The bus mayalso link various other circuits such as timing sources, peripherals,voltage regulators, power management circuits, and the like, which arewell known in the art, and therefore, will not be described any further.The processor may be implemented with one or more general-purpose and/orspecial-purpose processors. Examples include microprocessors,microcontrollers, DSP processors, and other circuitry that can executesoftware. Those skilled in the art will recognize how best to implementthe described functionality for the processing system depending on theparticular application and the overall design constraints imposed on theoverall system.

If implemented in software, the functions may be stored or transmittedover as one or more instructions or code on a computer readable medium.Software shall be construed broadly to mean instructions, data, or anycombination thereof, whether referred to as software, firmware,middleware, microcode, hardware description language, or otherwise.Computer-readable media include both computer storage media andcommunication media including any medium that facilitates transfer of acomputer program from one place to another. The processor may beresponsible for managing the bus and general processing, including theexecution of software modules stored on the machine-readable storagemedia. A computer-readable storage medium may be coupled to a processorsuch that the processor can read information from, and write informationto, the storage medium. In the alternative, the storage medium may beintegral to the processor. By way of example, the machine-readable mediamay include a transmission line, a carrier wave modulated by data,and/or a computer readable storage medium with instructions storedthereon separate from the wireless node, all of which may be accessed bythe processor through the bus interface. Alternatively, or in addition,the machine-readable media, or any portion thereof, may be integratedinto the processor, such as the case may be with cache and/or generalregister files. Examples of machine-readable storage media may include,by way of example, RAM (Random Access Memory), flash memory, ROM (ReadOnly Memory), PROM (Programmable Read-Only Memory), EPROM (ErasableProgrammable Read-Only Memory), EEPROM (Electrically ErasableProgrammable Read-Only Memory), registers, magnetic disks, opticaldisks, hard drives, or any other suitable storage medium, or anycombination thereof. The machine-readable media may be embodied in acomputer-program product.

A software module may comprise a single instruction, or manyinstructions, and may be distributed over several different codesegments, among different programs, and across multiple storage media.The computer-readable media may comprise a number of software modules.The software modules include instructions that, when executed by anapparatus such as a processor, cause the processing system to performvarious functions. The software modules may include a transmissionmodule and a receiving module. Each software module may reside in asingle storage device or be distributed across multiple storage devices.By way of example, a software module may be loaded into RAM from a harddrive when a triggering event occurs. During execution of the softwaremodule, the processor may load some of the instructions into cache toincrease access speed. One or more cache lines may then be loaded into ageneral register file for execution by the processor. When referring tothe functionality of a software module below, it will be understood thatsuch functionality is implemented by the processor when executinginstructions from that software module.

Also, any connection is properly termed a computer-readable medium. Forexample, if the software is transmitted from a website, server, or otherremote source using a coaxial cable, fiber optic cable, twisted pair,digital subscriber line (DSL), or wireless technologies such as infrared(IR), radio, and microwave, then the coaxial cable, fiber optic cable,twisted pair, DSL, or wireless technologies such as infrared, radio, andmicrowave are included in the definition of medium. Disk and disc, asused herein, include compact disc (CD), laser disc, optical disc,digital versatile disc (DVD), floppy disk, and Blu-ray® disc where disksusually reproduce data magnetically, while discs reproduce dataoptically with lasers. Thus, in some aspects computer-readable media maycomprise non-transitory computer-readable media (e.g., tangible media).In addition, for other aspects computer-readable media may comprisetransitory computer-readable media (e.g., a signal). Combinations of theabove should also be included within the scope of computer-readablemedia.

Thus, certain aspects may comprise a computer program product forperforming the operations presented herein. For example, such a computerprogram product may comprise a computer-readable medium havinginstructions stored (and/or encoded) thereon, the instructions beingexecutable by one or more processors to perform the operations describedherein. For example, instructions for performing the operationsdescribed herein and illustrated in FIGS. 7-11.

Further, it should be appreciated that modules and/or other appropriatemeans for performing the methods and techniques described herein can bedownloaded and/or otherwise obtained by a user terminal and/or basestation as applicable. For example, such a device can be coupled to aserver to facilitate the transfer of means for performing the methodsdescribed herein. Alternatively, various methods described herein can beprovided via storage means (e.g., RAM, ROM, a physical storage mediumsuch as a compact disc (CD) or floppy disk, etc.), such that a userterminal and/or base station can obtain the various methods uponcoupling or providing the storage means to the device. Moreover, anyother suitable technique for providing the methods and techniquesdescribed herein to a device can be utilized.

It is to be understood that the claims are not limited to the preciseconfiguration and components illustrated above. Various modifications,changes and variations may be made in the arrangement, operation anddetails of the methods and apparatus described above without departingfrom the scope of the claims.

What is claimed is:
 1. A method for wireless communications by a user equipment (UE), comprising: detecting, based on paging configurations, a conflict between configured paging occasions of at least two cells on which the UE is camped; identifying a different cell to camp on that is not subject to the conflict, wherein the different cell is not as good a candidate for cell selection as one of the conflicting cells in terms of cell selection criteria; and camping on the identified cell.
 2. The method of claim 1, wherein: the different cell is identified based on broadcast system information.
 3. The method of claim 2, further comprising reading the broadcast system information for the different cell during cell reselection.
 4. The method of claim 2, further comprising reading the broadcast system information for the different cell prior to performing cell reselection.
 5. An apparatus for wireless communications by a user equipment (UE), comprising: a memory having executable instructions stored thereon; and a processor configured to execute the executable instructions to cause the apparatus to: detect, based on paging configurations, a conflict between configured paging occasions of at least two cells on which the UE is camped; identify a different cell to camp on that is not subject to the conflict, wherein the different cell is not as good a candidate for cell selection as one of the conflicting cells in terms of cell selection criteria; and camp on the identified cell.
 6. The apparatus of claim 5, wherein: the different cell is identified based on broadcast system information.
 7. The apparatus of claim 6, wherein the processor is configured to cause the apparatus to read the broadcast system information for the different cell during cell reselection.
 8. The apparatus of claim 6, wherein the processor is configured to cause the apparatus to read the broadcast system information for the different cell prior to performing cell reselection.
 9. An apparatus for wireless communications by a user equipment (UE), comprising: means for detecting, based on paging configurations, a conflict between configured paging occasions of at least two cells on which the UE is camped; means for identifying a different cell to camp on that is not subject to the conflict, wherein the different cell is not as good a candidate for cell selection as one of the conflicting cells in terms of cell selection criteria; and means for camping on the identified cell.
 10. The apparatus of claim 9, wherein: the different cell is identified based on broadcast system information.
 11. The apparatus of claim 10, further comprising means for reading the broadcast system information for the different cell during cell reselection.
 12. The apparatus of claim 10, further comprising means for reading the broadcast system information for the different cell prior to performing cell reselection.
 13. A computer-readable medium having executable instructions stored thereon which, when executed by a processor, performs an operation comprising: detecting, based on paging configurations, a conflict between configured paging occasions of at least two cells on which the UE is camped; identifying a different cell to camp on that is not subject to the conflict, wherein the different cell is not as good a candidate for cell selection as one of the conflicting cells in terms of cell selection criteria; and camping on the identified cell.
 14. The computer-readable medium of claim 13, wherein: the different cell is identified based on broadcast system information.
 15. The computer-readable medium of claim 14, further comprising reading the broadcast system information for the different cell during cell reselection.
 16. The computer-readable medium of claim 14, further comprising reading the broadcast system information for the different cell prior to performing cell reselection. 